Sökning: "microphone"

Visar resultat 16 - 20 av 189 uppsatser innehållade ordet microphone.

  1. 16. An Investigation of Methods for Flow Measurements in a Gasketed Plate Heat Exchanger for Predictive Maintenance

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Viktor Ekström; [2022]
    Nyckelord :gasketed plate heat exchanger; electrical measurements; sensors; predictive maintenance; machine learning; Technology and Engineering;

    Sammanfattning : For a company to stay relevant in the long term, it is essential to keep up with the latest technology and continuously consider new innovative solutions for improving products and services. The gasketed plate heat exchanger (GPHE) is a mechanical device, and this work attempts to investigate different possibilities for incorporating sensor devices and predictive maintenance systems to improve the device. LÄS MER

  3. 17. Accuracy verification of GT-Power model and reduction of computational time

    Master-uppsats, KTH/Marcus Wallenberg Laboratoriet MWL

    Författare :Viktor Dahl; Maja Dyrsmeds; [2022]
    Nyckelord :Vehicle acoustics; GT-Power; Exhaust system; Internal combustion engine;

    Sammanfattning : The noise produced by any new vehicles is tightly regulated by the European Union which have developed a standardised method for measuring the emitted noise of new vehicles. The method involves a vehicle driving past carefully positioned microphones at a specific range of engine speeds. LÄS MER

  4. 18. Characterizing coil windings noise due to compressive fault currents : A study to determine if there is a characteristic noise from transformer windings due to fault currents

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Simon Lundgren; [2022]
    Nyckelord :Transformer windings; short circuit forces; current pulses; microphone; Comsol Multiphysics; FFT; Transformator lindningar; strömpulser; mikrofon; kortslutingskrafter; Comsol Multiphysics; FFT;

    Sammanfattning : Transformers are essential for modern power distribution system. They are efficient and enable the voltages to be transformed up for transportation of electricity and back down for consumer use. The reliability of the transformer is affected by faults and fatigue of the copper. LÄS MER

  5. 19. Automatic Virtual Tracking in a Multi-Participant Scenario for a Mobile Device

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

    Författare :Emelie Skoog; Elin Freberg; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : The aim of this thesis is to identify a speaker in a video stream by only using the camera of a smartphone. This creates the opportunity for a mobile application to track the speaking participant during a conference call. Conference systems that include this feature use a microphone array to localize sound and who the speaker is. LÄS MER

  7. 20. Removal of Noise from Speech - A case study of a construction machine

    Master-uppsats, KTH/Teknisk akustik

    Författare :Tomoya Otsuka; [2022]
    Nyckelord :signal processing; thesis; beamforming; noise; speech; construction machine; filter; real-time; microphone; measurements; signalbehandling; avhandling; beamforming; buller; tal; byggmaskin; filter; realtid; mikrofon; mätningar;

    Sammanfattning : This report proposes a solution to allow speech to enter a construction machine cabin while removing noise sources. Examples of noises sources include, engine noise, traffic or other construction activities. Survey of the possible methods to remove noise from speech was conducted, however, beamforming was the technique chosen. LÄS MER